Rotatable block housing



y 1927' E. HANSEN ROTATABLE BLOCK HOUSING 2 Shun-Shoat 1 Filed June 16,19 23 /4 I 1 Ire/06127150 9 Ham/6622 y 3 LE. HANSEN ROTATABLE BLOCKHOUSING set 2 if. iiaivs ezz/ Patented May- 17, 1927.

- UNITED STATES Lonnn'rz EMIL HANSEN, or BERGEN; NORWAY.

RO'I' ATABLE BLOCK HOUSI NG.

Application filed June 15, 1923,,Seria1 No. 645,840, and name June as,1922.v

The present invention relates t an arrangement of rotatableblockhousm-gs and the invention .is mainly characterized by the blockhousing being fastened, by, means of turning r ngs or the like, to itssupport or base part in such a manner that the housing with theblocksheave fully loaded may be turned or rotated horlzontallyinto anypositionwithout incur'rmgany shifting ot the hoisting line, which-alwaysremains in the I centre of the'circleof rotation. Further the inventionconsists in eli'ectively, in that the uppermost deckbecomes unobstructed(cleared) ,xWlllCll is very advantageous for the placing or declecargo,such cargo being also better protected than usual thereby against damagefrom the seawater.

The above mentioned advantages are ob.

tained .by arranging a rotatable block at'the top of the crane mast, sothat thehoisting line may be passed down through the interior of themast and to the hoisting machinery through suitable passages above orbelow the deck. The-hoisting machinery may be placedbelow the deck or inasuitable deck erect-ion so as 'to be protected,

against damages from sea-water orthe like. The hoisting'lines. may forinstance all be conducted tothe middle part ofthe'ship so that thewinches'may all be located in the midship" deck house and therebyalways'be under the control of the engine'sta'ft. 'TlllS isespeciallyadvantageous when electrically operated winches are employed,because the sorting apparatus for such winches, which apparatus occupybut a small space, maylhe located at'any convenient place'at' which the.

cated at any convenient placeon the ship without reducing the effect ofthe cranes. Further the cranes themselves may b65111 plifiedconsiderably, n that all cantilevers for the derricks may be dispensedwith above the use. of such block housings in connection withv hoistingcranes on board ships, whereby such cranes may be simplified andutilized most ing rib 55.

and below. .Hereby the area of action of the crane, in the lateraldirection is increased.

For unobstructed cranes the-area of action is:-i,1 1creased, to 360". 7The above mentioned system may naturally be. employed atany; place, butin the following deSol'iption the same will for the sake of simplicityonly be described in connection with ships.

-A constructional formot the invention is 1 g, drawings, 1n'WhIGh-fshown by way {of example inthe accompany Figure '1 is-avertical'section through the block'- housing; V

Figure 2 is a plan view of thesame; Figure 3-isapartial side view of aship equippedwith the invention;

'Eigure4is a front View. of asetot cranes; Figure 5 is afront view-0tv anovel swivellink ot'the derrick.

v Figure 6 shows the samepartially in section and-seen from the. side.

Tothe, base plate 42 (Figures 1 and 2) a ring or circular guide 43 isfastened'which at its periphery is formed with av groove 44 or thelike,in which the flange-.47- of a cover lsembedjded, said cover being formedfrom two semi-circular portions "45' and 46. Elie flange 47 serves fors'ecuringvthe rela-,v

tive position of the ring=43 and=the cover 45, 46. Each of therhalves4.5 .a11d 460i the cover; is equipped with-flanges 148, 49 through whichscrews 50 are'passed. :By: means of these screws thecover-halvesareclamped to the rin-g' 4S; Theupper plateol ofthe cover rests upon theupper faceof' the ring 43 and maybe rotatedcupon this.

In order to reduce the friction between the ringj43 iand, the cover,ball bearings (not shown.) may be arranged between the ad jacentrtaces.I On+thecover 45, 46 a block'housing52 is tastenechthe same beingiformedwitlrflanges 53, which are fixed'by means of screws-54 56 is the blocksheave, which by means of 7 a pin el 18 rotatably arranged in the blockhousing 52. 58 is the hoisting line, which is tothe cover,- sothatthe:housing lies sym-,

passed through an operture' 59 the cover I plate 51 and through anaperture 60 in the base plate 41-2. According to the drawing theaperture 60 is 01 the same size as the aperture 59, but it will beunderstood that the diameter of the former if desired may be made likethe inner diameter of the ring 43. As will be seen the block housingwith the sheave is arranged in such a manner on the cover 45, 16, thatthe hoisting line 5 8, will be situated in the centre 01 the cover andthe ring 13 at any horizontal position of the block housing 52.

The Figures 3 and 4 show the use of such block housings with cranes onboardships.

The crane masts 2 and 3 of the ship 1 are in the present instance hollowand are located at a suitable distance lromeach other in a planetransversely to the longitudinal axis of the ship. Near their upper endsthe masts are interconnected by means of a traverse or cross-piece 41,upon which the mast-head 5 is fastened. At the top of each of the masts2, 3 a block housing 52 is arranged, comprising a block sheave, so thatthe hoisting line 58 may be passed over the top sheave 8 of the derrick7 down into the interior of the masts. As will be understood it is notnecessary that the line is passed exactly through the centre of themast, in that it also may be disposed eccentrically to the axis of themast. At their lower ends the derricks 7 are rotatably fixed, so thatthey may turn in the vertical direction.

A fork 14c engages the outsides of the taslemng ears of the derrick 7 onthe ring 10.

The upper end of the fork 1% is formed with an eye 15 for the fasteningot a block 16, which together with the blocks 17 and 18 of which theformer is fixed to the rotatory ring of the block housing A whereas thelatter is fixed to the derrick head-servetor the guiding of a line 19 bymeans of which the derrick 7 may be held in different positions and theangular position of the same may be varied. One end of the bolt 9 isfurther formed with wings 20 to which the free end of the line 19 may befastened.

Owing to the fork 14- the derrick may without hindrance be swung up intoits maximum height position. Simultaneously the usual cantilevers forthe derrick may be dispensed with, as the pressure of theload willbe-better distributed on the derrick as well as on the mast, when thehoisting line is arranged as above described. Further, the lateralswinging of the derrick will be facilitated considerably, as itssuspension (the line 19) will swing round the mast together with thederrick so that no bending occurs.

The winches may be arranged behind the masts 2, 3 in suitable deckhouses 21, so that only the drums (22, of the winches are situatedoutside the said houses. The houses may be equipped on different sideswith covers or doors 241 and port-holes through which the crane operatormay survey the loading. hen steam winches are employed the startingvalve and the reversing gear (not shown) may be placed on the roof ofthe house 21. r 7

Owing to the arrangement of the winches in the described manner in adeck house, the entire upper deck will be tree for placing the deck loadand at the same time the winches are securely protected against damagesfrom water, breakage and the like.

When employing electrically operated winches the same may be arrangedamid shlps.

The derricks 7 shown 1n Figures 3 and a need only swing about becausetwo cranes are arranged side by side. The derricks may however alsoswing about 180, provided that no stays or shrouds are fastened to themast.

On fully unobstructed cranes the derricks may swing about 360. This isvery advantageous especially when the crane is located between twohatches, as the crane then may be employed at both hatches.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is 1. In combination with a crane having a hollow mast, acircular guide secured at the upperend of said mast, said guide beingprovided with a peripheral groove, a cover plate adapted to cooperatewith said groove for rotation therein, a housing on said plate and asheave in said housing, said housing, plate'and guide being providedwith openings to permit a cable to be passed over said sheave andthrough said mast.

2. crane as claimed in claim 1, said groove being provided on the outerperiph cry of the guide, said cover plate being formed from twosemi-circular members,

and means on said members for clamping the cover to the guide to permitrotation of the cover plate on the guide.

In testimony whereof I afiix my signature.

LORENTZ EMILTIANSEN.

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